Is it possible to make several closed forums and make different user groups for them. I mean, for example, - one forum for trusted users, second - only for moderators e.t.c.

Second question - is it possible to make closed forum invisible (in forumlist) for users, which not authorized in it. As it made with topics from closed forum.

Thanks!

Why not just use the Private forums option, putting the userIDs of the specific users you want to be allowed access to the forum, whether it be moderators or another specific group of users.

Also, In the manual there is an option to exclude last discussions option. Excluding certain forums from the Last Discussions list. But, it doesn't hide the forum itself from the list of forums.

There are explanations in the manual on how to do all of that. Sorry if I didn't explain it well